Yamaha YZF-R1P Service Manual page 412

EAS00791
4. The auxiliary light fails to come on.
1. Auxiliary light bulb and socket
• Check the auxiliary light bulb and socket
for continuity.
Refer to "CHECKING THE BULBS AND
SOCKETS"
• Are the auxiliary light bulb and socket OK?
YES
2. Voltage
• Connect the pocket tester (DC 20 V) to the
auxiliary light connectors (auxiliary light
side) as shown.
Positive tester probe → blue/red 1
Negative tester probe → black 2
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) of blue/red
1 on the auxiliary light connectors (auxil-
iary light side).
• Is the voltage within specification?
YES
This circuit is OK.
NO
Replace the auxiliary
light bulb, socket or
both.
NO
The wiring circuit
from the main switch
to the auxiliary light
connectors is faulty
and must be
repaired.
8 - 31
LIGHTING SYSTEM
EAS00792
5. The license plate light fails to come on.
1. License plate light bulb and socket
• Check the license plate light bulb and
socket for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
• Are the license plate light bulb and socket
OK?
YES
2. Voltage
• Connect the pocket tester (DC 20 V) to the
license plate light coupler (license plate
light side) as shown.
Positive tester probe → blue/red 1
Negative tester probe → black 2
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) of blue/red
1 on the license plate light coupler
(license plate light side).
• Is the voltage within specification?
YES
This circuit is OK.
– +
ELEC
NO
Replace the license
plate light bulb,
socket or both.
NO
The wiring circuit
from the main switch
to the license plate
light coupler is faulty
and must be
repaired.